If you were wiring hundreds of connectors then the price tag would be worth it. I used to make gigs to do wire tying & solder work similar to this back in the 70's for Crumar Keyboards and an airplane factory I worked for (separate times), but we made them out of blocks of aluminum so they acted as a heat sink as well & lated forever.

I made one of those over three years ago, but its not as nice looking. Mine is oriented horizontally and has the opposing gender panel connectors mounted on the block of wood. This seems better to me for two reasons. First, most soldering points on connectors are hollow and often open on the top half, XLRs and DINs for example. I can't see how soldering with the connector on it's end would work. The solder will run down into the female solder side ends of each pin, and the male solder points would also be odd to try and solder down on them using this guy's block. Mine holds the connector in the orientation needed to hold the solder where it's supposed to end up. Also, using panel connectors to mount the one being soldered serves as a heat sink and helps to cool the hot pins faster after completing the work. I'll post a picture sometime if I remember to. Also, I have some of those helper clips and never use them. I can hold the wire down with the tip of the iron and use my left hand to apply the solder in less time than it takes to setup with those clips. Funny how different people view doing work like this is.